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changes of levels if required;
Note.— If the clearance for the levels covers only
part of the route, it is important for the air traffic
control unit to specify a point to which the part of the
clearance regarding levels applies whenever necessary
to ensure compliance with 3.6.5.2.2 a) of Annex 2.
e) any necessary instructions or information on other
matters such as approach or departure manoeuvres,
communications and the time of expiry of the clearance.
Note.— The time of expiry of the clearance indicates
the time after which the clearance will be automatically
cancelled if the flight has not been commenced.
3.7.1.2 Recommendation.— Standard departure and
arrival routes and associated procedures should be established
when necessary to facilitate:
a) the safe, orderly and expeditious flow of air traffic;
b) the description of the route and procedure in air traffic
control clearances.
Note.— Material relating to the establishment of standard
departure and arrival routes and associated procedures is
contained in the Air Traffic Services Planning Manual
(Doc 9426). The design criteria are contained in PANS-OPS,
Volume II (Doc 8168).
3.7.2 Clearances for transonic flight
3.7.2.1 The air traffic control clearance relating to the
transonic acceleration phase of a supersonic flight shall extend
at least to the end of that phase.
3.7.2.2 Recommendation.— The air traffic control
clearance relating to the deceleration and descent of an
aircraft from supersonic cruise to subsonic flight should
provide for uninterrupted descent, at least during the transonic
phase.
3.7.3 Read-back of clearances and
safety-related information
3.7.3.1 The flight crew shall read back to the air traffic
controller safety-related parts of ATC clearances and instructions
which are transmitted by voice. The following items shall
always be read back:
a) ATC route clearances;
b) clearances and instructions to enter, land on, take off on,
hold short of, cross and backtrack on any runway; and
c) runway-in-use, altimeter settings, SSR codes, level
instructions, heading and speed instructions and, whether
issued by the controller or contained in ATIS broadcasts,
transition levels.
3.7.3.1.1 Other clearances or instructions, including
conditional clearances, shall be read back or acknowledged in
a manner to clearly indicate that they have been understood
and will be complied with.
3.7.3.1.2 The controller shall listen to the read-back to
ascertain that the clearance or instruction has been correctly
acknowledged by the flight crew and shall take immediate
action to correct any discrepancies revealed by the read-back.
3.7.3.2 Unless specified by the appropriate ATS authority,
voice read-back of CPDLC messages shall not be required.
Note.— The procedures and provisions relating to the
exchange and acknowledgement of CPDLC messages are
contained in Annex 10, Volume II and PANS-ATM, Chapter 14.
3.7.4 Coordination of clearances
An air traffic control clearance shall be coordinated between
air traffic control units to cover the entire route of an aircraft
or a specified portion thereof as follows.
3.7.4.1 An aircraft shall be cleared for the entire route to
the aerodrome of first intended landing:
Chapter 3 Annex 11 — Air Traffic Services
3-5 1/11/01
a) when it has been possible, prior to departure, to
coordinate the clearance between all the units under
whose control the aircraft will come; or
b) when there is reasonable assurance that prior coordination
will be effected between those units under whose
control the aircraft will subsequently come.
Note.— Where a clearance is issued covering the initial
part of the flight solely as a means of expediting departing
traffic, the succeeding en-route clearance will be as specified
above even though the aerodrome of first intended landing is
under the jurisdiction of an area control centre other than the
one issuing the en-route clearance.
3.7.4.2 When coordination as in 3.7.4.1 has not been
achieved or is not anticipated, the aircraft shall be cleared only
to that point where coordination is reasonably assured; prior to
reaching such point, or at such point, the aircraft shall receive
further clearance, holding instructions being issued as
appropriate.
3.7.4.2.1 When prescribed by the appropriate ATS
authority, aircraft shall contact a downstream air traffic control
unit, for the purpose of receiving a downstream clearance prior
to the transfer of control point.
3.7.4.2.1.1 Aircraft shall maintain the necessary two-way
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Air Traffic Services 附件11(28)
